1 Department of Infection, Division of Infection and Immunity, Centre for Clinical Microbiology, University College London, London, UK; NIHR Biomedical Research Centre, University College London Hospitals, London, UK.
2 School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong (HKU), Hong Kong Special Administrative Region, China.
3 Research and Innovation Center, King Saud Medical City, Ministry of Health and College of Medicine, Al Faisal University, Riyadh, Saudi Arabia; Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA; Division of Infectious Diseases, Kyung Hee University, Seoul, South Korea.
4 Department of Microbiology and Immunology and Department of Pediatrics, University of Iowa, Iowa City, IA 52246, USA. Electronic address: stanley-perlman@uiowa.edu.